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STD Quiz

Test your knowledge!

The following quiz is designed to test your knowledge of sexually transmitted disease. Choose your answers carefully — many of the questions are tricky! After submitting your answers, a check mark will appear along with information about the correct answer. Good luck!

More Info: Teens & STDs

STD Facts

STI vs. STD

Diseases that are spread through sexual contact are usually called "sexually transmitted diseases," or STDs. Recently, however, many public health experts have suggested replacing STD with a new term — "sexually transmitted infection," or STI.

Why the change? The word "disease," as in STD, implies a clear medical problem, usually some obvious symptom. But many of the most common STDs have no signs or symptoms in infected women and men, or they have mild signs and symptoms that are easily overlooked. So the sexually transmitted virus or bacteria can be described as creating "infection," which may or may not result in a "disease."

This is true of chlamydia, gonorrhea, herpes, and human papillomavirus (HPV), to name a few. All STDs are STIs, but not all STIs are STDs. For this reason, in some of the published literature, the term "disease" has been replaced by "infection."

Teens & condoms

Teens are less likely than older women to use contraception consistently. For people under the age of 18, condoms fail for 18.4% of couples within 12 months. In preventing pregnancy, condoms have a general standardized failure rate of 14.7% over the course of a year, but for teens living together, condom users experience an unplanned pregnancy of over 50% over the course of a year. For teens not living together, condoms users experienced an unplanned pregnancy of 14-23% of the time over the course of a year.